Engine Control System (Diagnostic Codes (P0365 - U0101) & Circuit Tests): Diagnosis Lexus GS III facelift

INSPECTION PROCEDURE

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to FREEZE FRAME DATA .

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1. CHECK ECM TERMINAL VOLTAGE Inspect the ECM using an oscilloscope. While the engine is idling, check the waveform between the terminals of the ECM connector. Standard voltage Tester Connection Specified Condition E8-32 (NE+) - E8-31 (NE-) Correct waveform appears as shown E45-24 (EV1+) - E45-23 (EV1-) E45-21 (EV2+) - E45-20 (EV2-) OK --> REPLACE ECM NG: Go to next step
2. CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE) Disconnect the E58 or E66 VVT sensor connector. Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition E58-3 (VC2) - Body ground 4.5 to 5.0 V E66-3 (VC2) - Body ground 4.5 to 5.0 V NG --> See step 6 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR EXHAUST SIDE - ECM) Disconnect the E58 or E66 VVT sensor connector. Disconnect the E45 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition E58-1 (EX+) - E45-24 (EV1+) Below 1 ohms E58-2 (EX-) - E45-23 (EV1-) Below 1 ohms E66-1 (EX+) - E45-21 (EV2+) Below 1 ohms E66-2 (EX-) - E45-20 (EV2-) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition E58-1 (EX+) or E45-24 (EV1+) - Body ground 10 kohms or higher E58-2 (EX-) or E45-23 (EV1-) - Body ground 10 kohms or higher E66-1 (EX+) or E45-21 (EV2+) - Body ground 10 kohms or higher E66-2 (EX-) or E45-20 (EV2-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK VVT SENSOR FOR EXHAUST SIDE (SENSOR INSTALLATION) Check the VVT sensor installation. OK Sensor is installed correctly. NG --> SECURELY REINSTALL SENSOR OK: Go to next step
5. CHECK EXHAUST CAMSHAFT Check the teeth of the camshaft. NG --> REPLACE EXHAUST CAMSHAFT OK --> REPLACE VVT SENSOR FOR EXHAUST SIDE
6. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR EXHAUST SIDE - ECM) Disconnect the E58 or E66 VVT sensor connector. Disconnect the E45 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition E45-22 (VCE1) - E58-3 (VC2) Below 1 ohms E45-19 (VCE2) - E66-3 (VC2) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition E45-22 (VCE1) or E58-3 (VC2) - Body ground 10 kohms or higher E45-19 (VCE2) or E66-3 (VC2) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE ECM

CONDITIONING FOR SENSOR TESTING

HINT

Perform the operation with the engine speeds and time durations described below prior to checking the waveforms of the A/F and HO2 sensors. This is performed in order to activate the sensors sufficiently to obtain the appropriate inspection results.

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1. (a) Connect the Techstream to the DLC3.
2. (b) Start the engine and warm it up with all the accessories switched OFF, until the engine coolant temperature stabilizes.
3. (c) Run the engine at an engine speed of between 2500 rpm and 3000 rpm for at least 3 minutes.
4. (d) While running the engine at 3000 rpm for 2 seconds and 2000 rpm for 2 seconds, check the waveforms of the A/F and HO2 sensors using the Techstream.

HINT

1. If either of the voltage outputs of the Air-Fuel Ratio (A/F) or Heated Oxygen (HO2) sensor does not fluctuate, or either of the sensors makes a noise, the sensor may be malfunctioning.
2. If the voltage outputs of both the sensors remain lean or rich, the air fuel ratio may be extremely lean or rich. In such cases, perform the following A/F CONTROL using the Techstream.
3. If the Three-Way Catalytic Converter (TWC) has deteriorated, the HO2 sensor (located behind the TWC) voltage output fluctuates up and down frequently, even under normal driving conditions (active air-fuel ratio control is not performed).

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HINT

The Techstream only

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the Air-Fuel Ratio (A/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

1. (1) Connect the Techstream to the DLC3.
2. (2) Start the engine and turn the Techstream on.
3. (3) Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
4. (4) Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
5. (5) Perform the Control the Injection Volume for A/F Sensor operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume).
6. (6) Monitor the voltage outputs of the A/F and HO2 sensors (AFS Voltage B1 S1 and O2S B1 S2 or AFS Voltage B2 S1 and O2S B2 S2) displayed on the Techstream.

HINT

1. The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%.
2. Each sensor reacts in accordance with increases and decreases in the fuel injection volume. Standard Tester Display (Sensor) Injection Volume Status Voltage AFS Voltage B1 S1 or AFS Voltage B2 S1 (A/F) +25% Rich Less than 3.1 AFS Voltage B1 S1 or AFS Voltage B2 S1 (A/F) -12.5% Lean More than 3.4 O2S B1 S2 or O2S B2 S2 (HO2) +25% Rich More than 0.55 O2S B1 S2 or O2S B2 S2 (HO2) -12.5% Lean Less than 0.4

Note. The Air-Fuel Ratio (A/F) sensor has an output delay of a few seconds and the Heated Oxygen (HO2) sensor has a maximum output delay of approximately 20 seconds.

Case Air Fuel Ratio Sensor (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit 4 Fuel pressure Gas leakage from exhaust system (Air fuel ratio extremely lean or rich)

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1. Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the A/F and HO2 sensors.
2. To display the graph, select the following menu items; Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AFS Voltage B1 S1 or AFS Voltage B1 S1 and B1 S2 or O2S B2 S2; then press the YES button and then the ENTER button followed by the F4 button.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to FREEZE FRAME DATA .

DTC SUMMARY

HINT

The reference orifice is located inside the canister pump module.

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

HINT

The canister pressure sensor is built into the canister pump module.

Note. When a vehicle is brought into the workshop, leave it as it is. Do not change the vehicle condition. For example, do not tighten the fuel cap. Do not disassemble the canister pump module. The Techstream is required to conduct the following diagnostic troubleshooting procedure.

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1. CONFIRM DTC AND EVAP PRESSURE Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read the values. Select the following menu items: Powertrain / Engine and ECT / Data List / Vapor Pressure Pump. Read the EVAP pressure displayed on the Techstream. Result Display (DTC Output) Test Result Suspected Trouble Area Proceed to P0451 - Canister pressure sensor A P0452 Less than 45 kPa (338 mmHg) Wire harness/connector (ECM - canister pressure sensor) Canister pressure sensor Short in ECM circuit B P0453 More than 120 kPa (900 mmHg) Wire harness/connector (ECM - canister pressure sensor) Canister pressure sensor Open in ECM circuit C C --> See step 4 A --> GO TO EVAP SYSTEM B: Go to next step
2. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Turn the engine switch off. Disconnect the A6 ECM connector. Measure the resistance between the PPMP terminal of the ECM connector and the body ground. Result Test Result Suspected Trouble Area Proceed to 10 ohms or less Wire harness/connector (ECM - canister pressure sensor) Short in canister pressure sensor circuit A 10 kohms or more Wire harness/connector (ECM - canister pressure sensor) Short in ECM circuit B B --> See step 7 A: Go to next step
3. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Disconnect the V17 canister pump module connector. Disconnect the A6 ECM connector. Measure the resistance between the PPMP terminal of the ECM connector and the body ground. Result Test Result Suspected Trouble Area Proceed to 10 kohms or more Short in canister pressure sensor circuit A 10 ohms or less Short in wire harness/connector (ECM - canister pressure sensor) B B --> See step 6 A: Go to next step
4. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Disconnect the V17 canister pump module connector. Turn the engine switch on (IG). Measure the voltage and resistance of the canister pump module connector. Standard voltage Tester Connection Specified Condition V17-4 - Body ground 4.5 to 5.0 V V17-3 - Body ground 4.5 to 5.0 V Standard resistance Tester Connection Specified Condition V17-2 - Body ground 100 ohms or less Result Test Result Suspected Trouble Area Proceed to Voltage and resistance within standard ranges Open in canister pressure sensor circuit A Voltage and resistance outside standard ranges Open in wire harness/connector (ECM - canister pressure sensor) B B --> See step 6 A: Go to next step
5. REPLACE CANISTER ASSEMBLY Replace the canister assembly Refer to «REMOVAL»(ref-382716-S26115109462011012800000) . NOTE: When replacing the canister, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. NEXT --> See step 8
6. REPAIR OR REPLACE HARNESS OR CONNECTOR HINT: If the exhaust tailpipe has been removed, go to the next step before reinstalling it. NEXT --> See step 8
7. REPLACE ECM Replace the ECM Refer to «REMOVAL»(ref-382728-S20466676072011012800000) . NEXT --> See step 8
8. CHECK WHETHER DTC OUTPUT RECURS (AFTER REPAIR) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Wait for at least 60 seconds. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. HINT: If no pending DTC is displayed on the Techstream, the repair has been successfully completed. NEXT --> COMPLETED

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to FREEZE FRAME DATA .

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1. CHECK OPERATION OF STOP LIGHT Check whether the stop lights turn on and off normally when the brake pedal is depressed and released. OK Stop lights turn on when brake pedal is depressed. NG --> REPAIR OR REPLACE STOP LIGHT SWITCH CIRCUIT OK: Go to next step
2. INSPECT STOP LIGHT SWITCH Remove the stop light switch assembly. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Switch Position Specified Condition 1 - 2 Switch pin free Below 1 ohms 3 - 4 10 kohms or higher 1 - 2 Switch pin pushed in 10 kohms or higher 3 - 4 Below 1 ohms Reinstall the stop light switch assembly. NG --> REPLACE STOP LIGHT SWITCH OK: Go to next step
3. READ VALUE USING TECHSTREAM (STP SIGNAL AND ST1- VOLTAGE) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Data List / Stop Light Switch. Check the STP signal when the brake pedal is depressed and released. Standard Brake Pedal Operation Specified Condition Depressed STP signal ON Released STP signal OFF Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Brake Pedal Operation Specified Condition A6-8 (ST1-) - E7-7 (E1) Depressed Below 1.5 V Released 7.5 to 14 V OK --> CHECK FOR INTERMITTENT PROBLEMS NG: Go to next step
4. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - ECM) Disconnect the A35 stop light switch connector. Disconnect the A6 and A7 ECM connectors. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition A35-1 (Stop light switch) - A7-4 (STP) Below 1 ohms A35-4 (Stop light switch) - A6-8 (ST1-) Standard resistance (Check for short) Tester Connection Specified Condition A35-1 (Stop light switch) or A7-4 (STP) - Body ground 10 kohms or higher A35-4 (Stop light switch) or A6-8 (ST1-) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 5
5. REPLACE ECMRefer to «REMOVAL»(ref-382728-S20466676072011012800000)

HINT

1. The following conditions may also cause DTC P0505 to be set: The floor carpet overlapping onto the accelerator pedal, causing the accelerator pedal to be slightly depressed and therefore the throttle valve position to be slightly open. The accelerator pedal being not fully released.
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to «FREEZE FRAME DATA»(ref-382723-S29949148122011012800000) .

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

HINT

1. DTC P050B may be set when the engine shows the symptom as listed below. If necessary, check the trouble area as listed below. Symptoms Factor Trouble Area Low idle speed at engine cold Excessive engine friction Engine oil deterioration Drive belt tension A/C compressor Generator Rough idle at engine cold Abnormal combustion Fuel quality
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to FREEZE FRAME DATA .

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1. CHECK FUSE (EFI FUSE) Remove the EFI fuse from the engine room No. 2 junction block. Measure the resistance of the EFI fuse. Standard resistance Below 1 ohms Reinstall the EFI fuse. NG --> CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE OK: Go to next step
2. INSPECT ECM (BATT VOLTAGE) Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition A6-4 (BATT) - E7-7 (E1) 11 to 14 V NG --> See step 3 OK --> REPLACE ECM
3. CHECK HARNESS AND CONNECTOR (ECM - EFI FUSE, EFI FUSE - BATTERY) Check the harness and the connector between the EFI fuse and ECM. Remove the EFI fuse from the engine room No. 2 junction block. Disconnect the A6 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition EFI fuse (2) - A6-4 (BATT) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition EFI fuse (2) or A6-4 (BATT) - Body ground 10 kohms or higher Check the harness and the connector between the EFI fuse and battery. Remove the EFI fuse from the engine room No. 2 Junction Block. Disconnect the positive (+) battery terminal. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition Battery positive terminal - EFI fuse (1) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition Battery positive terminal or EFI fuse (1) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. INSPECT BATTERY Check that the battery is not depleted. NG --> REPLACE BATTERY OK --> CHECK AND REPLACE ENGINE ROOM NO. 2 JUNCTION BLOCK

HINT

1. The following troubleshooting flowchart is based on the premise that the engine is cranked normally. If the engine does not crank, proceed to the problem symptoms table Refer to «PROBLEM SYMPTOMS TABLE»(ref-382723-S40817931562011012800000) .
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to «FREEZE FRAME DATA»(ref-382723-S29949148122011012800000) .

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1. READ VALUE USING TECHSTREAM (STARTER SIGNAL) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Data List / Starter Signal. Check the value displayed on the Techstream when the engine switch is turned on (IG) and the engine is started. OK Engine Switch Condition on (IG) ENGINE START STARTER SIG OFF ON OK --> REPLACE ECM NG: Go to next step
2. INSPECT PARK / NEUTRAL POSITION SWITCH ASSEMBLY Inspect the Park/Neutral Position (PNP) switch. Disconnect the E77 switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance Gear Selector Lever Position Tester Connection Specified Condition P 4 (B) - 5 (L) Below 1 ohms N 4 (B) - 5 (L) Below 1 ohms NG --> REPLACE PARK / NEUTRAL POSITION SWITCH (THEN CHECK CRANKING HOLDING FUNCTION CIRCUIT) OK --> CHECK CRANKING HOLDING FUNCTION CIRCUIT

HINT

Read freeze frame data using the The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to FREEZE FRAME DATA .

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to FREEZE FRAME DATA .

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1. INSPECT FUEL PUMP FOR HIGH PRESSURE Disconnect the E73 fuel pump for high pressure connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 1.19 to 1.39 ohms NG --> REPLACE FUEL PUMP FOR HIGH PRESSURE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - FUEL PUMP FOR HIGH PRESSURE) Disconnect the E54 injector driver (EDU) connector. Disconnect the E73 fuel pump for high pressure connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition E54-3 (FP+) - E73-1 Below 1 ohms E54-4 (FP-) - E73-2 Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition E54-3 (FP+) or E73-1 - Body ground 10 kohms or higher E54-4 (FP-) or E73-2 - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - ECM) Disconnect the E45 ECM connector. Disconnect the E53 injector driver (EDU) connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition E45-32 (FPF1) - E53-7 (FPF1) Below 1 ohms E45-33 (FPD) - E53-8 (FPD) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition E45-32 (FPF1) or E53-7 (FPF1) - Body ground 10 kohms or higher E45-33 (FPD) or E53-8 (FPD) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. REPLACE INJECTOR DRIVER NEXT: Go to next step
5. CHECK IF DTC OUTPUT REOCCURS (SEE IF DTC P1235 IS OUTPUT AGAIN) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Clear DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Start the engine. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs using the Techstream. Result Display (DTC output) Proceed to P1235 A No output B B --> END A --> REPLACE ECM

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to «FREEZE FRAME DATA»(ref-382723-S29949148122011012800000) .

1. The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor Open Duty / Throttle Motor Close Duty) can be read using the Techstream. However, the ECM shuts off the throttle actuator current when the ETCS malfunctions.

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1. INSPECT THROTTLE BODY (RESISTANCE OF THROTTLE ACTUATOR) Disconnect the E39 throttle body connector. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition 2 (M+) - 1 (M-) 20°C (68°F) 0.3 to 100 ohms NG --> REPLACE THROTTLE BODY OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (THROTTLE CONTROL MOTOR - ECM) Disconnect the E39 throttle body connector. Disconnect the E8 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition E39-2 (M+) - E8-2 (M+) Below 1 ohms E39-1 (M-) - E8-1 (M-) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition E39-2 (M+) or E8-2 (M+) - Body ground 10 kohms or higher E39-1 (M-) or E8-1 (M-) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT THROTTLE BODY (VISUALLY CHECK THROTTLE VALVE) Check for foreign objects between the throttle valve and the housing. NG --> REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY OK: Go to next step
4. INSPECT THROTTLE VALVE Check if the throttle valve opens and closes smoothly. NG --> REPLACE THROTTLE BODY OK --> REPLACE ECM

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to FREEZE FRAME DATA .

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to FREEZE FRAME DATA .

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1. CHECK FUSE (ETCS FUSE) Remove the ETCS fuse from the engine room No. 2 relay block. Measure the resistance of the ETCS fuse. Standard resistance Below 1 ohms Reinstall the ETCS fuse. NG --> CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE OK: Go to next step
2. INSPECT ECM (+BM VOLTAGE) Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition E8-5 (+BM) - Body ground 9 to 14 V OK --> CHECK FOR INTERMITTENT PROBLEMS NG: Go to next step
3. CHECK HARNESS AND CONNECTOR (ECM - ETCS FUSE, ETCS FUSE - BATTERY) Check the harness and connector between the ETCS fuse and ECM. Remove the ETCS fuse from the engine room No. 2 relay block. Disconnect the E8 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition ETCS fuse (2) - E8-5 (+BM) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition ETCS fuse (2) or E8-5 (+BM) - Body ground 10 kohms or higher Check the harness and connector between the ETCS fuse and positive (+) battery cable. Remove the ETCS fuse from the engine room No. 2 relay block. Disconnect the positive (+) battery cable. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition Positive battery cable - ETCS fuse (1) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition Positive battery cable or ETCS fuse (1) - Body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE ECM

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to FREEZE FRAME DATA .

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to «FREEZE FRAME DATA»(ref-382723-S29949148122011012800000) .

1. These DTCs relate to the Accelerator Pedal Position (APP) sensor.

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1. READ VALUE USING TECHSTREAM (ACCELERATOR POSITION NO. 1 AND ACCELERATOR POSITION NO. 2) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Data List / Accelerator Position No. 1 and Accelerator Position No. 2. Read the value displayed on the Techstream. Standard voltage Accelerator Pedal Operation Accelerator Position No. 1 (AP#1) Accelerator Position No. 2 (AP#2) Released 0.5 to 1.1 V 1.2 to 2.0 V Depressed 2.6 to 4.5 V 3.4 to 5.0 V OK --> See step 5 NG: Go to next step
2. CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM) Disconnect the A34 Accelerator Pedal Position (APP) sensor connector. Disconnect the A7 ECM connector. Measure the resistance according to the value(s) in the table below. Standard resistance (Check for open) Tester Connection Specified Condition A34-6 (VPA) - A7-33 (VPA) Below 1 ohms A34-5 (EPA) - A7-34 (EPA) Below 1 ohms A34-4 (VCPA) - A7-35 (VCPA) Below 1 ohms A34-3 (VPA2) - A7-32 (VPA2) Below 1 ohms A34-2 (EPA2) - A7-26 (EPA2) Below 1 ohms A34-1 (VCP2) - A7-27 (VCP2) Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition A34-6 (VPA) or A7-33 (VPA) - body ground 10 kohms or higher A34-5 (EPA) or A7-34 (EPA) - body ground 10 kohms or higher A34-4 (VCPA) or A7-35 (VCPA) - body ground 10 kohms or higher A34-3 (VPA2) or A7-32 (VPA2) - body ground 10 kohms or higher A34-2 (EPA2) or A7-26 (EPA2) - body ground 10 kohms or higher A34-1 (VCP2) or A7-27 (VCP2) - body ground 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. INSPECT ECM (VCPA AND VCP2 VOLTAGE) Disconnect the A34 APP sensor connector. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Specified Condition A7-35 (VCPA) - A7-34 (EPA) 4.5 to 5.0 V A7-27 (VCP2) - A7-26 (EPA2) 4.5 to 5.0 V NG --> REPLACE ECM OK: Go to next step
4. REPLACE ACCELERATOR PEDAL ROD ASSEMBLY Replace the accelerator pedal rod assembly Refer to «REMOVAL»(ref-382728-S15765327222011012800000) . NEXT: Go to next step
5. CHECK WHETHER DTC OUTPUT RECURS (ACCELERATOR PEDAL POSITION SENSOR DTCS) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Clear DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . Start the engine. Allow the engine to idle for 15 seconds. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P2120, P2122, P2123, P2125, P2127, P2128, and/or P2138 A No output B B --> SYSTEM OK A --> REPLACE ECM

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to «FREEZE FRAME DATA»(ref-382723-S29949148122011012800000) .
2. This DTC relates to the Accelerator Pedal Position (APP) sensor.

HINT

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the Air-fuel Ratio (A/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

1. Connect the Techstream to the DLC3.
2. Start the engine and turn the Techstream on.
3. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
4. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
5. Perform the Control the Injection Volume for A/F Sensor operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume).
6. Monitor the output voltages of the A/F and HO2 sensors (AFS Voltage B1 S1 and O2S B1 S2 or AFS Voltage B2 S1 and O2S B2 S2) displayed on the Techstream.

HINT

1. The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%.
2. Each sensor reacts in accordance with increases in the fuel injection volume.

Note. The Air-Fuel Ratio (A/F) sensor has an output delay of a few seconds and the HO2S (sensor 2) output has a maximum output delay of 20 seconds.

Case Air Fuel Ratio Sensor (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit 4 Fuel pressure Gas leakage from exhaust system (Air fuel ratio extremely lean or rich)

1. Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the A/F and HO2 sensors.
2. To display the graph, select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / AFS Voltage B1 S1 and O2S B1 S1, then press the graph button on the Data List view.

HINT

1. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to «FREEZE FRAME DATA»(ref-382723-S29949148122011012800000) .
2. A low A/F sensor voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
3. A high A/F sensor voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.

Scheme 105

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P2195, P2196, 2197 OR P2198) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Read DTCs. Result Display (DTC Output) Proceed to P2195, P2196, P2197, or P2198 A P2195, P2196, P2197, or P2198 and other DTCs B HINT: If any DTCs other than P2195, P2196, P2197 or P2198 are output, troubleshoot those DTCs first. B --> GO TO DTC CHART A: Go to next step
2. READ VALUE USING TECHSTREAM (TEST VALUE OF A/F SENSOR) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Clear DTCs. Allow the vehicle to drive in accordance with the driving pattern described in the CONFIRMATION DRIVING PATTERN. Select the following menu items: Powertrain / Engine and ECT / Monitor / O2 Sensor. Check that the status of O2 Sensor is Complete. If the status is still Incomplete, drive the vehicle according to the driving pattern again. HINT: Complete indicates that the component is functioning normally. Incomplete indicates that the component is malfunctioning. Select the following menu items: Powertrain / Engine and ECT / Monitor / O2 Sensor / Details / RANGE B1 S1 / Details. Check the test value of the A/F sensor output current during fuel-cut. Result Test Value Proceed to Within normal range (0.78 mA or more, and less than 3.6 mA) A Outside normal range (Less than 0.78 mA, or 3.6 mA or more) B B --> See step 22 A: Go to next step
3. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF A/F SENSOR) Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Warm up the Air-Fuel Ratio (A/F) sensor at an engine speed of 2500 rpm for 90 seconds. Select the following menu items: Powertrain / Engine and ECT / Data List / AFS Voltage B1 S1 or AFS Voltage B2 S1 and Engine Speed. Check the A/F sensor voltage 3 times, when the engine is in each of the following conditions: (1) While idling (check for at least 30 seconds) (2) At an engine speed of approximately 2500 rpm (without any sudden changes in engine speed) (3) Raise the engine speed to 4000 rpm and then quickly release the accelerator pedal so that the throttle valve is fully closed. Standard voltage Condition A/F Sensor Voltage Variation Reference (1) and (2) Changes at approximately 3.3 V Between 3.1 V and 3.5 V (3) Increases to 3.8 V or more This occurs during engine deceleration (when fuel-cut performed) HINT: For more information, see the diagrams below. If the output voltage of the A/F sensor remains at approximately 3.3 V (see Malfunction Condition diagram) under any conditions, including those above, the A/F sensor may have an open circuit. (This will also happen if the A/F sensor heater has an open circuit.) If the output voltage of the A/F sensor remains at either approximately 3.8 V or more, or 2.8 V or less (see Malfunction Condition diagram) under any conditions, including those above, the A/F sensor may have a short circuit. The ECM stops fuel injection (fuel cut) during engine deceleration. This causes a lean condition and results in a momentary increase in the A/F sensor output voltage. The ECM must establish a closed throttle valve position learning value to perform fuel cut. If the battery terminal has been reconnected, the vehicle must be driven over 10 mph (16 km/h) to allow the ECM to learn the closed throttle valve position. When the vehicle is driven: The output voltage of the A/F sensor may be below 2.8 V during fuel enrichment. For the vehicle, this translates to a sudden increase in speed with the accelerator pedal fully depressed when trying to overtake another vehicle. The A/F sensor is functioning normally. The A/F sensor is a current output element; therefore, the current is converted into a voltage inside the ECM. Measuring the voltage at the connectors of the A/F sensor or ECM will show a constant voltage result. NG --> See step 10 OK: Go to next step
4. PERFORM CONFIRMATION DRIVING PATTERN NEXT: Go to next step
5. CHECK WHETHER DTC OUTPUT RECURS (DTC P2195, P2196, P2197 OR P2198) Read DTCs using the Techstream. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Result Display (DTC Output) Proceed to P2195, P2196, P2197, or P2198 A No output B B --> See step 9 A: Go to next step
6. REPLACE AIR FUEL RATIO SENSOR Replace the A/F sensor Refer to «REMOVAL»(ref-382716-S20672511762011012800000) . NEXT: Go to next step
7. PERFORM CONFIRMATION DRIVING PATTERN NEXT: Go to next step
8. CHECK WHETHER DTC OUTPUT RECURS (DTC P2195, P2196, P2197 OR P2198) Read DTCs using the Techstream. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Result Display (DTC Output) Proceed to No output A P2195, P2196, P2197, or P2198 B B --> REPLACE ECM AND PERFORM CONFIRMATION DRIVING PATTERN A: Go to next step
9. CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST NO --> CHECK FOR INTERMITTENT PROBLEMS YES --> DTC CAUSED BY RUNNING OUT OF FUEL
10. INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE). Refer to «PROCEDURE - Step 1»(ref-382726-S18098091762011012800000) NG --> REPLACE AIR FUEL RATIO SENSOR OK: Go to next step
11. INSPECT A/F RELAY. Refer to «PROCEDURE - Step 5»(ref-382726-S18098091762011012800000) NG --> REPLACE A/F RELAY OK: Go to next step
12. CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM). Refer to «PROCEDURE - Step 13»(ref-382726-S23637917462011012800000) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
13. CHECK AIR INDUCTION SYSTEM Check the air induction system for vacuum leakage. OK No leakage from air induction system. NG --> REPAIR OR REPLACE AIR INDUCTION SYSTEM OK: Go to next step
14. CHECK FUEL PRESSURE Check the fuel pressure Refer to «ON-VEHICLE INSPECTION»(ref-382729-S01558181072011012800000) . NG --> REPAIR OR REPLACE FUEL SYSTEM (LOW PRESSURE SIDE) OK: Go to next step
15. INSPECT FUEL INJECTOR FOR PORT INJECTION Inspect the fuel injector for port injection Refer to «INSPECTION»(ref-382714-S41495257602011012800000) . NG --> REPLACE FUEL INJECTOR FOR PORT INJECTION OK: Go to next step
16. READ VALUE USING TECHSTREAM (FUEL PRESS) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Start the engine. Select the following menu items: Powertrain / Engine and ECT / Data List / Fuel Press. While revving the engine, check that the fuel pressure fluctuates. Standard Idling 3 to 5 MPa (30.6 to 51.0 kgf/cm 2 , 435 to 725 psi) 2000 rpm (No load) 7 to 9 MPa (71.4 to 91.8 kgf/cm 2 , 1016 to 1306 psi) HINT: The A/C switch and all accessory switches should be OFF, and the transmission gear selector lever should be in the N or P position, and the engine should be fully warmed up. NG --> REPAIR OR REPLACE FUEL SYSTEM (HIGH PRESSURE SIDE) OK: Go to next step
17. INSPECT FUEL INJECTOR FOR DIRECT INJECTION Inspect the fuel injector for direct injection Refer to «INSPECTION»(ref-382714-S14500762472011012800000) . NG --> REPLACE FUEL INJECTOR FOR DIRECT INJECTION OK: Go to next step
18. REPLACE AIR FUEL RATIO SENSOR Replace the A/F sensor Refer to «REMOVAL»(ref-382716-S20672511762011012800000) . NEXT: Go to next step
19. PERFORM CONFIRMATION DRIVING PATTERN NEXT: Go to next step
20. CHECK WHETHER DTC OUTPUT RECURS (DTC P2195, P2196, P2197 OR P2198) Read DTCs using the Techstream. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes / Pending. Read DTCs. Result Display (DTC Output) Proceed to No output A P2195, P2196, P2197 or P2198 B B --> REPLACE ECM A: Go to next step
21. CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST NO --> CHECK FOR INTERMITTENT PROBLEMS YES --> DTC CAUSED BY RUNNING OUT OF FUEL
22. REPLACE AIR FUEL RATIO SENSOR Replace the A/F sensor Refer to «REMOVAL»(ref-382716-S20672511762011012800000) . NEXT: Go to next step
23. PERFORM CONFIRMATION DRIVING PATTERN NEXT: Go to next step
24. CHECK WHETHER DTC OUTPUT RECURS (DTC P2195, P2196, P2197 OR P2198) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Read DTCs using the Techstream. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes / Pending. Read DTCs. Result Display (DTC Output) Proceed to No output A P2195, P2196, P2197 or P2198 (A/F sensor pending DTCs) B B --> REPLACE ECM A --> END

HINT

The Techstream only

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the Air-Fuel Ratio (A/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

1. Connect the Techstream to the DLC3.
2. Start the engine and turn the Techstream on.
3. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
4. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
5. Perform the Control the Injection Volume for A/F Sensor operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume).
6. Monitor the output voltages of the A/F and HO2 sensors (AFS Voltage B1 S1 and O2S B1 S2) displayed on the Techstream.

HINT

1. The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%.
2. The sensors react in accordance with increases and decreases in the fuel injection volume.

Standard

Note. The A/F sensor has an output delay of a few seconds and the HO2 sensor has a maximum output delay of approximately 20 seconds.

Case Air Fuel Ratio Sensor (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit 4 Fuel pressure Gas leakage from exhaust system (Air fuel ratio extremely lean or rich)

1. Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the output voltages of both the A/F and HO2 sensors.
2. To display the graph, select the following menu items on the Techstream: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / AFS Voltage B1 S1 and O2S B1 S2. Then press the graph button on the Data List View.

HINT

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to FREEZE FRAME DATA .

HINT

The vent valve is built into the canister pump module.

Refer to the EVAP System. Refer to INSPECTION PROCEDURE .

HINT

1. DTC P2610 is set if an internal ECM problem is detected. Diagnostic procedures are not required. ECM replacement is required.
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to «FREEZE FRAME DATA»(ref-382723-S29949148122011012800000) .

HINT

The Techstream only

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the Air-fuel Ratio (A/F) sensor, Heated Oxygen (HO2) sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the Techstream.

1. Connect the Techstream to the DLC3.
2. Start the engine and turn the Techstream on.
3. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.
4. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
5. Perform the Control the Injection Volume for A/F Sensor operation with the engine in an idling condition (press the RIGHT or LEFT button to change the fuel injection volume).
6. Monitor the output voltages of the A/F and HO2 sensors (AFS Voltage B1 S1 and O2S B1 S2 or AFS Voltage B2 S1 and O2S B2 S2) displayed on the Techstream.

HINT

1. The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 25%.
2. Each sensor reacts in accordance with increases in the fuel injection volume.

Note. The Air-Fuel Ratio (A/F) sensor has an output delay of a few seconds and the Heated Oxygen (HO2) sensor has a maximum output delay of approximately 20 seconds.

Case Air Fuel Ratio Sensor (Sensor 1) Output Voltage Heated Oxygen Sensor (Sensor 2) Output Voltage Main Suspected Trouble Area 1 - 2 Air fuel ratio sensor Air fuel ratio sensor heater Air fuel ratio sensor circuit 3 Heated oxygen sensor Heated oxygen sensor heater Heated oxygen sensor circuit 4 Fuel pressure Gas leakage from exhaust system (Air fuel ratio extremely lean or rich)

1. Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the A/F and HO2 sensors.
2. To display the graph, select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / AFS Voltage B1 S1 and O2S B1 S1 or AFS Voltage B2 S1 and O2S B2 S2.

HINT

1. DTC P2A00 or P2A03 may also be set, when the air fuel ratio is stuck rich or lean.
2. A low A/F sensor voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
3. A high A/F sensor voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.
4. Read freeze frame data using Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to «FREEZE FRAME DATA»(ref-382723-S29949148122011012800000) .

Note. The Techstream is required to conduct the following diagnostic troubleshooting procedure.

HINT

1. Using the Techstream monitor results enables the EVAP (Evaporative Emission) system to be confirmed.
2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Refer to «FREEZE FRAME DATA»(ref-382723-S29949148122011012800000) .

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Scheme 125

1. CONFIRM DTC Turn the engine switch off and wait for 10 seconds. Turn the engine switch on (IG). Turn the engine switch off and wait for 10 seconds. Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes. Confirm DTCs and freeze frame data. If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below. NOTE: If the reference pressure difference between the first and second checks is greater than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) are stored. NEXT: Go to next step
2. PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE) NOTE: The Evaporative System Check (Automatic Mode) consists of 5 steps performed automatically by Techstream. It takes a maximum of approximately 18 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F). Clear DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . On the Techstream, select the following menu items: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode. After the Evaporative System Check is completed, check for pending DTCs by selecting the following menu items: Powertrain / Engine and ECT / Trouble Codes / Pending. HINT: If no pending DTCs are displayed, perform the Monitor Confirmation. After this confirmation, check for pending DTCs. If no DTCs are displayed, the EVAP system is normal. NEXT: Go to next step
3. PERFORM EVAPORATIVE SYSTEM CHECK (MANUAL MODE) NOTE: In the Evaporative System Check (Manual Mode), perform the series of 5 EVAP SYSTEM CHECK steps manually using the Techstream. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F). Clear DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . On the Techstream, select the following menu items: Powertrain / Engine and ECT / Utility / Evaporative System Check / Manual Mode. NEXT: Go to next step
4. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 1/5) Check the EVAP pressure in step 1/5. Result DTC No. * Test Result Suspected Trouble Area Proceed to - Virtually no variation in EVAP pressure Not yet determined A P0451 EVAP pressure fluctuates by +/-0.3 kPa (2.25 mmHg) or more Canister pressure sensor noise B * : These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. B --> See step 30 A: Go to next step
5. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 1/5 TO 2/5) Check the EVAP pressure in steps 1/5 and 2/5. Result DTC No. * Test Result Suspected Trouble Area Proceed to - Virtually no variation in EVAP pressure during step 1/5. Then decreases to reference pressure Not yet determined A P2402 Small difference between EVAP pressures during steps 1/5 and 2/5 Leak detection pump stuck ON B * : These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. HINT: The first reference pressure is the value determined in step 2/5. B --> See step 23 A: Go to next step
6. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 2/5) HINT: Make a note of the pressures checked in steps (a) and (b) below. (a) Check the EVAP pressure 4 seconds after the leak detection pump is activated * . * : The leak detection pump begins to operate as step 1/5 finishes and step 2/5 starts. (b) Check the EVAP pressure again when it has stabilized. This pressure is the reference pressure. Result DTC No. * Test Result Suspected Trouble Area Proceed to - EVAP pressure in step (b) between -4.85 kPa and -1.057 kPa (-36.4 mmHg and -7.93 mmHg) Not yet determined A P043F and P2401 EVAP pressure in step (b) -1.057 kPa (-7.93 mmHg) or more Reference orifice high-flow Leak detection pump stuck OFF B P043E EVAP pressure in step (b) below -4.85 kPa (-36.4 mmHg) Reference orifice clogged C P2419 EVAP pressure in step (a) more than -1.057 kPa (-7.93 mmHg) Vent valve stuck closed D *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. D --> See step 19 C --> See step 30 B --> See step 11 A: Go to next step
7. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 2/5 TO 3/5) Check the EVAP pressure increase in step 3/5. Result DTC No. * Test Result Suspected Trouble Area Proceed to - EVAP pressure increases by 0.3 kPa (2.25 mmHg) or more within 10 seconds of proceeding from step 2/5 to step 3/5 Not yet determined A P2420 No variation in EVAP pressure despite proceeding from step 2/5 to step 3/5 Vent valve stuck open (vent) B P0451 No variation in EVAP pressure during steps 1/5 through 3/5 Canister pressure sensor malfunction fixed C * : These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. C --> See step 30 B --> See step 20 A: Go to next step
8. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 3/5) Wait until the EVAP pressure change is less than 0.1 kPa (0.75 mmHg) for 30 seconds. Measure the EVAP pressure and record it. HINT: A few minutes are required for the EVAP pressure to become saturated. When there is little fuel in the fuel tank, it takes up to 15 minutes. NEXT: Go to next step
9. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 4/5) Check the EVAP pressure in step 4/5. Result DTC No. * Test Result Suspected Trouble Area Proceed to - EVAP pressure increases by 0.3 kPa (2.25 mmHg) or more within 10 seconds of proceeding from step 3/5 to step 4/5 Not yet determined A P0441 EVAP pressure increases by 0.3 kPa (2.25 mmHg) or more within 10 seconds of proceeding from step 3/5 to step 4/5 Problems in EVAP hose between purge VSV and intake manifold B P0441 Variation in EVAP pressure less than 0.3 kPa (2.25 mmHg) for 10 seconds, after proceeding from step 3/5 to step 4/5 Purge VSV stuck closed C * : These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. C --> See step 12 B --> See step 15 A: Go to next step
10. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 5/5) Check the EVAP pressure in step 5/5. Compare the EVAP pressure in step 3/5 and the second reference pressure (step 5/5). Result DTC No. * Test Result Suspected Trouble Area Proceed to - EVAP pressure (step 3/5) lower than second reference pressure (step 5/5) Not yet determined (no leakage from EVAP system) A P0441 and P0455 EVAP pressure (step 3/5) higher than [second reference pressure (step 5/5) x 0.2] Purge VSV stuck open EVAP gross leak B P0456 EVAP pressure (step 3/5) higher than second reference pressure (step 5/5) EVAP small leak B * : These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. B --> See step 12 A --> See step 36
11. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 3/5) Check the EVAP pressure in step 3/5. Result DTC No. * Test Result Suspected Trouble Area Proceed to P043F EVAP pressure less than [reference pressure] measured at 2/5 Reference orifice high-flow A P2401 EVAP pressure almost same as [reference pressure] measured at 2/5 Leak detection pump stuck OFF B * : These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. HINT: The first reference pressure is the value determined in step 2/5. B --> See step 23 A --> See step 30
12. PERFORM ACTIVE TEST USING TECHSTREAM (EVAP VSV) On the Techstream, select the following menu items: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control. Disconnect the hose (connected to the canister) from the purge VSV. Start the engine. Using the Techstream, turn off the purge VSV (Activate the VSV for Evap Control: OFF). Use your finger to confirm that the purge VSV has no suction. Using the Techstream, turn on the purge VSV (Activate the VSV for Evap Control: ON). Use your finger to confirm that the purge VSV has suction. Result Test Result Suspected Trouble Area Proceed to No suction when purge VSV turned OFF, and suction applied when turned ON Purge VSV normal A Suction applied when purge VSV turned OFF Purge VSV stuck open B No suction when purge VSV turned ON Purge VSV stuck closed Problems with EVAP hose between purge VSV and intake air surge tank C C --> See step 15 B --> See step 14 A: Go to next step
13. CHECK FUEL CAP ASSEMBLY Check that the fuel cap is correctly installed and confirm the fuel cap meets OEM specifications. Confirm that the fuel cap is tightened until a few click sounds are heard. HINT: If an EVAP tester is available, check the fuel cap using the tester. Remove the fuel cap and install it onto a fuel cap adaptor. Connect an EVAP tester pump hose to the adaptor, and pressurize the cap to 3.2 to 3.7 kPa (24 to 28 mmHg) using an EVAP tester pump. Seal the adaptor and wait for 2 minutes. Check the pressure. If the pressure is 2 kPa (15 mmHg) or more, the fuel cap is normal. Reinstall the fuel cap. Result Test Result Suspected Trouble Area Proceed to Fuel cap correctly installed - A Fuel cap loose Fuel cap improperly installed Defective fuel cap Fuel cap does not meet OEM specifications B No fuel cap - C C --> See step 28 B --> See step 27 A --> See step 29
14. INSPECT PURGE VSV Turn the engine switch off. Disconnect the E18 purge VSV connector. Disconnect the hose (connected to the canister) from the purge VSV. Start the engine. Use your finger to confirm that the purge VSV has no suction. Result Test Result Suspected Trouble Area Proceed to No suction ECM A Suction applied Purge VSV B B --> See step 31 A --> See step 35
15. CHECK EVAP HOSE (PURGE VSV - INTAKE MANIFOLD) Disconnect the hose (connected to the intake air surge tank) from the purge VSV. Start the engine. Use your finger to confirm that the hose has suction. Result Test Result Suspected Trouble Area Proceed to Suction applied EVAP hose between purge VSV and intake air surge tank normal A No suction Intake air surge tank EVAP hose between purge VSV and intake air surge tank B B --> See step 26 A: Go to next step
16. INSPECT PURGE VSV Remove the purge VSV. Apply the battery voltage to the terminals of the purge VSV. Using an air gun, confirm that air flows from port A to port B. Result Test Result Suspected Trouble Area Proceed to Air flows Purge VSV normal A No air flow Purge VSV B Reinstall the purge VSV. B --> See step 31 A: Go to next step
17. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF PURGE VSV) Disconnect the E18 purge VSV connector. Turn the engine switch on (IG). Measure the voltage between terminal 1 of the purge VSV connector and the body ground. Result Test Result Suspected Trouble Area Proceed to 11 to 14 V Normal A Other than result above Wire harness or connectors between purge VSV and ECM B B --> See step 32 A: Go to next step
18. CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) Disconnect the E8 ECM connector and the E18 purge VSV connector. Check the resistance. Standard resistance (Check for open) Tester Connection Specified Condition E8-11 (PRG) - E18-2 Below 1 ohms Standard resistance (Check for short) Tester Connection Specified Condition E8-11 (PRG) - Body ground 10 kohms or higher E18-2 - Body ground 10 kohms or higher NG --> See step 32 OK --> See step 35
19. PERFORM ACTIVE TEST USING TECHSTREAM (VENT VALVE) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Active Test / Activate the VSV for Vent Valve. Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned ON (close) and OFF (vent) using the Techstream. Result Test Result Suspected Trouble Area Proceed to 9 to 14 V when OFF Below 3 V when ON Vent valve A Below 3 V when OFF and ON ECM B B --> See step 35 A --> See step 22
20. PERFORM ACTIVE TEST USING TECHSTREAM (VENT VALVE) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Active Test /Activate the VSV for Vent Valve. Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned ON (close) and OFF (vent) using the Techstream. Result Test Result Suspected Trouble Area Proceed to Below 3 V when OFF and ON Power source of vent valve A 9 to 14 V when OFF Below 3 V when ON Vent valve B 9 to 14 V when OFF and ON ECM C C --> See step 35 B --> See step 22 A: Go to next step
21. INSPECT CANISTER PUMP MODULE (POWER SOURCE FOR VENT VALVE) Turn the engine switch off. Disconnect the V17 canister pump module connector. Turn the engine switch on (IG). Measure the voltage between V17-9 terminal of the canister pump module connector and the body ground. Result Test Result Suspected Trouble Area Proceed to 9 to 14 V Normal A Below 3 V Power source wire harness of vent valve B B --> See step 32 A: Go to next step
22. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION) Turn the engine switch off. Disconnect the V17 canister pump module connector. Apply the battery voltage to terminals 8 and 9 terminals of the canister pump module. Touch the canister pump module to confirm the vent valve operation. Result Test Result Suspected Trouble Area Proceed to Operating Wire harness between vent valve and ECM A Not operating Vent valve B B --> See step 30 A --> See step 32
23. PERFORM ACTIVE TEST USING TECHSTREAM (FOR LEAK DETECTION PUMP) Connect the Techstream to the DLC3. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Active Test / Activate the Vacuum Pump. Measure the voltage between terminal MPMP of the ECM connector and the body ground when the leak detection pump is turned ON and OFF using the Techstream. Result Test Result Suspected Trouble Area Proceed to Below 3 V when OFF 9 to 14 V when ON ECM normal A 9 to 14 V when OFF Below 3 V when ON ECM B B --> See step 35 A: Go to next step
24. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM) Connect the Techstream to the DLC3. Turn the engine switch off. Disconnect the V17 canister pump module connector. Turn the engine switch on (IG) and turn the Techstream on. Select the following menu items: Powertrain / Engine and ECT / Active Test / Activate the Vacuum Pump. Turn the leak detection pump on. Measure the voltage between V17-1 terminal of the canister pump module connector and the body ground. Result Test Result Suspected Trouble Area Proceed to 9 to 14 V Normal A Below 3 V Wire harness between ECM and leak detection pump B B --> See step 32 A: Go to next step
25. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - GROUND) Disconnect the V17 canister pump module connector. Turn the engine switch off. Check the resistance between V17-6 terminal of the canister pump module connector and the body ground. Result Test Result Suspected Trouble Area Proceed to Below 1 ohms Leak detection pump A 10 kohms or more Wire harness between leak detection pump and body ground B B --> See step 32 A --> See step 30
26. INSPECT INTAKE AIR SURGE TANK (EVAP PURGE PORT) Stop the engine. Disconnect the EVAP hose from the intake air surge tank. Start the engine. Use your finger to confirm that the port of the intake air surge tank has suction. Result Test Result Suspected Trouble Area Proceed to Suction applied EVAP hose between intake air surge tank and purge VSV A No suction Intake air surge tank B B --> See step 34 A --> See step 33
27. CORRECTLY REINSTALL OR REPLACE FUEL CAP ASSEMBLY HINT: When reinstalling the fuel cap, tighten it until a few click sounds are heard. When replacing the fuel cap, use a fuel cap that meets OEM specifications, and install it until a few click sounds are heard. NEXT --> See step 37
28. REPLACE FUEL CAP ASSEMBLY HINT: When installing the fuel cap, tighten it until a few click sounds are heard. NEXT --> See step 37
29. LOCATE EVAP LEAK PART Disconnect the vent hose. Connect the EVAP pressure tester tool to the canister with the adapter. Pressurize the EVAP system to 3.2 to 3.7 kPa (24 to 28 mmHg). Apply soapy water to the piping and connecting parts of the EVAP system. Look for areas where bubbles appear. This indicates the leak point. Repair or replace the leak point. HINT: Disconnect the hose between the canister and the fuel tank from the canister. Block the canister side and conduct an inspection. In this way, the fuel tank can be excluded as an area suspected of causing fuel leaks. NEXT --> See step 37
30. REPLACE CANISTER ASSEMBLY Replace the canister assembly Refer to «REMOVAL»(ref-382716-S26115109462011012800000) . NOTE: When replacing the canister, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. NEXT --> See step 37
31. REPLACE PURGE VSV Disconnect the connector and the hoses from the purge VSV. Remove the purge VSV. Install a new purge VSV. NEXT --> See step 37
32. REPAIR OR REPLACE HARNESS OR CONNECTOR NEXT --> See step 37
33. REPLACE EVAP HOSE (INTAKE AIR SURGE TANK - PURGE VSV) NEXT --> See step 37
34. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) Check that the EVAP purge port of the intake air surge tank is not clogged. If necessary, replace the intake air surge tank. NEXT --> See step 37
35. REPLACE ECM Replace the ECM Refer to «REMOVAL»(ref-382728-S20466676072011012800000) . NEXT --> See step 37
36. REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in. NEXT --> See step 37
37. PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE) NOTE: The Evaporative System Check (Automatic Mode) consists of 5 steps performed automatically by the Techstream. It takes a maximum of approximately 18 minutes. Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable. Do not run the engine during this operation. When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the temperature below 35°C (95°F). Clear DTCs Refer to «DTC CHECK / CLEAR»(ref-382723-S32023580312011012800000) . On the Techstream, select following menu items: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode. After the Evaporative System Check is completed, check for pending DTCs by selecting the following menu items: Powertrain / Engine and ECT / Trouble Codes / Pending. HINT: If no pending DTCs are found, the repair has been successfully completed. NEXT --> COMPLETED